JPH1184214A - Light shielding film for camera - Google Patents
Light shielding film for cameraInfo
- Publication number
- JPH1184214A JPH1184214A JP24841997A JP24841997A JPH1184214A JP H1184214 A JPH1184214 A JP H1184214A JP 24841997 A JP24841997 A JP 24841997A JP 24841997 A JP24841997 A JP 24841997A JP H1184214 A JPH1184214 A JP H1184214A
- Authority
- JP
- Japan
- Prior art keywords
- shielding film
- light shielding
- light
- layer
- camera
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Blocking Light For Cameras (AREA)
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はズーム機能を有する
カメラに組み込んで用いられる遮光フィルムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-shielding film used in a camera having a zoom function.
【０００２】[0002]
【従来の技術】近年、カメラの高機能化、小型化が急速
に進み、コンパクトタイプのカメラにもズーム機能を有
するものが多くなってきた。カメラにおいては当然のこ
とながら外部の光を内部に侵入させないという遮光性は
重要であるが、ズーム機能を有するコンパクトカメラの
場合は、カメラ自体が小型であるため大型カメラとは異
なる遮光方式が採用される。2. Description of the Related Art In recent years, the functions and miniaturization of cameras have rapidly advanced, and more and more compact cameras have a zoom function. Of course, it is important for cameras to have a light-shielding property that prevents external light from entering the interior.However, in the case of a compact camera that has a zoom function, a light-shielding method different from that of a large camera is adopted because the camera itself is small. Is done.
【０００３】かようなコンパクトカメラにおける遮光方
式としては、例えば、図１に示すように、カメラボディ
ー６とズーム機能を有するレンズ筒７との間に遮光フィ
ルム５を配置する方式が知られている。As a light-shielding method in such a compact camera, for example, as shown in FIG. 1, a method in which a light-shielding film 5 is arranged between a camera body 6 and a lens barrel 7 having a zoom function is known. .
【０００４】この遮光フィルムとしては、例えば、図２
に示すようにカーボン粉末とフッ素樹脂粉末を混合して
フィルム状に成形し、これを貫通孔３を有するように円
板状に打ち抜き、更に、その片面の外周端縁に接着剤層
４を設けたものが用いられている。[0004] As this light shielding film, for example, FIG.
As shown in (1), a carbon powder and a fluororesin powder are mixed and formed into a film shape, which is punched into a disk shape having a through-hole 3, and further provided with an adhesive layer 4 on one outer peripheral edge. Is used.
【０００５】そして、この遮光フィルム５をカメラに組
み込むには、上記図１に示したように、貫通孔３のやや
外側で略Ｌ字状に折り曲げ、接着剤層４によりカメラボ
ディー６に固定し、更に、貫通孔３にズーム機能を有す
るレンズ筒７を挿通させている。In order to incorporate the light-shielding film 5 into the camera, as shown in FIG. 1, the light-shielding film 5 is bent into a substantially L-shape slightly outside the through hole 3, and is fixed to the camera body 6 by the adhesive layer 4. Further, a lens barrel 7 having a zoom function is inserted through the through hole 3.
【０００６】[0006]
【発明が解決しようとする課題】ところで、上記のよう
にして遮光フィルムをカメラに組み込むに際しては、通
常、貫通孔の直径をレンズ筒の直径よりもやや小さめに
設定しておき、レンズ筒を強制的に挿通させている。When the light-shielding film is incorporated in the camera as described above, the diameter of the through-hole is usually set to be slightly smaller than the diameter of the lens barrel, and the lens barrel is forcibly mounted. It is inserted through.
【０００７】このように遮光フィルムの貫通孔にレンズ
筒を強制挿通させる意図は、挿通後にフッ素樹脂製遮光
フィルムに生ずる寸法復元力により該フィルムをレンズ
筒に密着させて、この部分での遮光を果たすことにある
（強制挿通は遮光フィルムを貫通孔部分で円周方向に伸
長させることであり、挿通後にはこの部分に伸長前の寸
法に戻ろうとする応力が生じ、これがレンズ筒に対する
締付力として作用するので、遮光フィルムがレンズ筒に
密着し、その結果、この部分での遮光を達成できると期
待される）。As described above, the intention of forcibly inserting the lens tube into the through hole of the light-shielding film is that the film is brought into close contact with the lens tube by the dimensional restoring force generated in the fluororesin light-shielding film after the insertion, so that light is blocked at this portion. (Forced insertion is to extend the light-shielding film in the circumferential direction at the through-hole portion, and after insertion, a stress is generated in this portion to return to the size before expansion, and this is the tightening force on the lens barrel. It is expected that the light-shielding film adheres tightly to the lens barrel, so that light-shielding can be achieved in this part).
【０００８】しかし、従来の遮光フィルムにおけるこの
応力（寸法復元力＝締付力）は期待するほどでなく、そ
の向上が望まれている。However, this stress (dimensional restoring force = clamping force) in the conventional light-shielding film is not as expected, and its improvement is desired.
【０００９】[0009]
【課題を解決するための手段】本発明者は従来技術の有
する課題を解決するため鋭意研究の結果、フッ素樹脂層
の表面に特定の層を形成することにより、これら問題を
解決できることを見い出し、本発明を完成するに至った
ものである。Means for Solving the Problems The present inventor has made intensive studies to solve the problems of the prior art, and as a result, found that these problems can be solved by forming a specific layer on the surface of the fluororesin layer. The present invention has been completed.
【００１０】即ち、本発明は、フッ素樹脂層と該フッ素
樹脂層上に設けられた合成樹脂層を有することを特徴と
する遮光フィルムに関するものである。That is, the present invention relates to a light-shielding film having a fluororesin layer and a synthetic resin layer provided on the fluororesin layer.
【００１１】[0011]
【発明の実施の形態】図３は本発明に係る遮光フィルム
の実例を示し、フッ素樹脂層１の片面には合成樹脂層２
が設けられている。３は遮光フィルムをカメラ内に組み
込む際にレンズ筒を挿通させるために設けられた貫通
孔、４は遮光フィルムをカメラボディーに固定するため
合成樹脂層２の外周端縁に設けられた接着剤層である。
遮光フィルムのカメラボディーへの固定は接着以外の手
段（例えば、融着）で行なうこともできるので、接着剤
層は省略することもできる。FIG. 3 shows an example of a light-shielding film according to the present invention. A synthetic resin layer 2 is provided on one side of a fluororesin layer 1.
Is provided. Reference numeral 3 denotes a through hole provided for inserting a lens barrel when the light-shielding film is incorporated into the camera. Reference numeral 4 denotes an adhesive layer provided on the outer peripheral edge of the synthetic resin layer 2 for fixing the light-shielding film to the camera body. It is.
Since the light-shielding film can be fixed to the camera body by means other than bonding (for example, fusion), the adhesive layer can be omitted.
【００１２】図３に示す遮光フィルム５は前記図２と同
様な円板状であるが、その形状はカメラに組み込み可能
であれば、矩形等任意であってよい。The light-shielding film 5 shown in FIG. 3 has a disk shape similar to that of FIG. 2, but may have any shape such as a rectangle as long as it can be incorporated in a camera.
【００１３】上記フッ素樹脂層１はポリテトラフルオロ
エチレン（ＰＴＦＥ）、テトラフルオロエチレン−パー
フルオロアルキルビニルエーテル共重合体（ＰＦＡ）、
テトラフルオロエチレン−ヘキサフルオロプロピレン共
重合体（ＦＥＰ）、エチレン−テトラフルオロエチレン
共重合体（ＥＴＦＥ）等任意のフッ素樹脂から形成でき
るが、摺動抵抗の小ささからＰＴＦＥが特に好ましい。
なお、フッ素樹脂層の厚さは特に限定されないが、通
常、約２５〜２００μｍとする。The fluororesin layer 1 is made of polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkylvinyl ether copolymer (PFA),
Although it can be formed from any fluororesin such as tetrafluoroethylene-hexafluoropropylene copolymer (FEP) and ethylene-tetrafluoroethylene copolymer (ETFE), PTFE is particularly preferred because of its low sliding resistance.
The thickness of the fluororesin layer is not particularly limited, but is usually about 25 to 200 μm.
【００１４】一方、合成樹脂層２はフッ素樹脂を除く合
成樹脂により形成される。この合成樹脂層２は遮光フィ
ルムの寸法復元力を決定するもので、この力を大きなも
のとするため、弾性率の高い合成樹脂、例えば、ポリエ
チレンテレフタレート（ＰＥＴ）、ポリブチレンテレフ
タレート、ポリプロピレン、ポリイミド（ＰＩ）、ポリ
カーボネート、ポリアクリル、ポリエーテルスルホン等
で形成するのが好ましい。この合成樹脂層の厚さも限定
されるものでないが、通常、約２５〜２００μｍとされ
る。On the other hand, the synthetic resin layer 2 is formed of a synthetic resin excluding a fluororesin. The synthetic resin layer 2 determines the dimensional restoring force of the light-shielding film. In order to increase the force, a synthetic resin having a high elastic modulus, for example, polyethylene terephthalate (PET), polybutylene terephthalate, polypropylene, polyimide ( PI), polycarbonate, polyacryl, polyethersulfone, or the like. The thickness of the synthetic resin layer is not limited, but is usually about 25 to 200 μm.
【００１５】かような本発明に係る遮光フィルムは、例
えば、フッ素樹脂フィルムと合成樹脂フィルムを接着や
融着により一体化させ、次いで、打ち抜き等により貫通
孔を形成する方法により得ることができる。そして、こ
の際、フッ素樹脂フィルムと合成樹脂フィルムとの接着
力を増すため、少なくとも一方のフィルム表面にアルカ
リ金属処理、スパッタエッチング処理、コロナ放電処理
等の接着処理を施したり、両フィルム間にプライマー層
（例えば、ゴム系プライマー、コロイダルシリカ等の金
属酸化物微粒子含有フッ素樹脂層等）を介在させること
ができる。The light-shielding film according to the present invention can be obtained by, for example, a method in which a fluororesin film and a synthetic resin film are integrated by bonding or fusion, and then a through hole is formed by punching or the like. At this time, in order to increase the adhesive strength between the fluororesin film and the synthetic resin film, at least one of the film surfaces is subjected to an adhesion treatment such as an alkali metal treatment, a sputter etching treatment, a corona discharge treatment, or a primer between the two films. A layer (for example, a fluororesin layer containing fine particles of metal oxide such as rubber-based primer and colloidal silica) can be interposed.
【００１６】遮光フィルムは当然ことながら光遮蔽機能
を有することが必要であり、従って、本発明において
は、フッ素樹脂層あるいは合成樹脂層のうちの少なくと
も一つの層に顔料、染料、カーボン粉末、グラファイト
粉末等を配合して着色（好ましくは黒色）し、光不透過
性とするのが好ましい。勿論、これ以外の手段、例え
ば、フッ素樹脂層と合成樹脂層の間に、光遮蔽層を設け
る方法、あるいは合成樹脂層の裏面（フッ素樹脂層と接
する面の反対面）に光遮蔽層を設ける方法によって、光
遮蔽機能を付与してもよい。Naturally, the light-shielding film must have a light-shielding function. Therefore, in the present invention, at least one of the fluororesin layer and the synthetic resin layer is provided with a pigment, a dye, a carbon powder, and a graphite. It is preferable that the powder is mixed (preferably black) by mixing a powder or the like to make it light impermeable. Of course, other means, such as a method of providing a light shielding layer between the fluororesin layer and the synthetic resin layer, or providing a light shielding layer on the back surface of the synthetic resin layer (the surface opposite to the surface in contact with the fluororesin layer) Depending on the method, a light shielding function may be provided.
【００１７】本発明に係る遮光フィルムのカメラへの配
置は上記従来品と同様であってよい。例えば、遮光フィ
ルムを貫通孔のやや外側で略Ｌ字状に折り曲げると共に
合成樹脂層の外周端縁を接着剤層によりカメラボディー
に固定し、更に、貫通孔にレンズ筒を強制挿通させた構
造とすることができる。このようにすれば、遮光フィル
ムは合成樹脂層の大きな寸法復元力（締付力）により常
にレンズ筒に密着するので、光が内部に侵入するような
不都合を防止できる。The arrangement of the light-shielding film according to the present invention on a camera may be the same as that of the above-mentioned conventional product. For example, a structure in which a light-shielding film is bent into a substantially L-shape slightly outside the through hole, the outer peripheral edge of the synthetic resin layer is fixed to the camera body with an adhesive layer, and a lens tube is forcibly inserted into the through hole. can do. With this configuration, the light-shielding film is always in close contact with the lens barrel due to the large dimensional restoring force (tightening force) of the synthetic resin layer, so that inconvenience such as light entering into the inside can be prevented.
【００１８】[0018]
【実施例】以下、実施例により本発明を更に詳細に説明
する。The present invention will be described in more detail with reference to the following examples.
【００１９】実施例１ ＰＴＦＥ成形用粉末１００重量部に対し、カーボン粉末
３重量部を配合し、この混合粉末を金型内に充填し、圧
力１５０ｋｇ／ｃｍ2 で４０分間加熱加圧して円筒状に
成形し、これを金型から取り出し、次に、温度３６０℃
で３０時間加熱して焼成する。その後、旋盤で厚さ５０
μｍのフィルム状に切削する。そして、このＰＴＦＥフ
ィルムの片面をアルカリ金属処理液により接着処理す
る。Example 1 3 parts by weight of carbon powder was blended with 100 parts by weight of PTFE molding powder, the mixed powder was filled in a mold, and heated and pressed at a pressure of 150 kg / cm 2 for 40 minutes to obtain a cylindrical shape. , Which is removed from the mold, and then heated to a temperature of 360 ° C.
And bake for 30 hours. Then, turn the lathe to a thickness of 50
Cut into a μm film. Then, one surface of the PTFE film is subjected to an adhesion treatment with an alkali metal treatment liquid.
【００２０】一方、これとは別に厚さ５０μｍのＰＩフ
ィルム（宇部興産社製、商品名ユーピレックスＳ）の片
面にポリエステル系接着剤液（ノガワケミカル社製、商
品名ダイヤボンドＤＡ３０８０Ｔ）を塗布し、１００℃
で５分間加熱乾燥させることにより、接着剤層（厚さ５
０μｍ）を形成する。On the other hand, a polyester adhesive liquid (Diabond DA3080T, manufactured by Nogawa Chemical Co., Ltd.) is applied to one surface of a PI film (trade name, UPILEX S, manufactured by Ube Industries, Ltd.) having a thickness of 50 μm. 100 ℃
The adhesive layer (thickness 5)
0 μm).
【００２１】ＰＴＦＥフィルムのアルカリ金属処理面
と、ＰＩフィルムの接着剤層形成面を対向させ、温度１
３０℃、圧力３．５ｋｇ／ｃｍ2 の条件で５秒間加熱加
圧することにより、厚さ１５０μｍの遮光フィルムを得
た。The alkali metal-treated surface of the PTFE film and the adhesive layer-formed surface of the PI film are opposed to each other.
By heating and pressing at 30 ° C. and a pressure of 3.5 kg / cm 2 for 5 seconds, a light-shielding film having a thickness of 150 μm was obtained.
【００２２】この遮光フィルムを外径４２ｍｍ、内径３
８ｍｍになるように円板状に打ち抜き、更に、ＰＩフィ
ルムの外周端縁に両面接着テープを接着させることによ
り、図２と同構造とする。This light-shielding film was formed with an outer diameter of 42 mm and an inner diameter of 3 mm.
It is punched into a disk shape so as to have a thickness of 8 mm, and a double-sided adhesive tape is adhered to the outer peripheral edge of the PI film.
【００２３】そして、これを市販のコンパクトカメラ
（レンズ筒の直径３７ｍｍ）に組み込み、−２０℃と７
０℃を各々３０分毎に繰り返す環境試験機中でレンズを
１分毎にズーム移動させる摺動試験を２０００回行なっ
た後、遮光フィルムとレンズ筒との接触部分を目視によ
り観察したが、光の漏れはなく、遮光フィルムとレンズ
筒の密着性は良好であることが確認できた。Then, this was incorporated into a commercially available compact camera (diameter of lens barrel: 37 mm),
After performing 2000 sliding tests in which the lens was zoomed every minute in an environmental tester in which 0 ° C. was repeated every 30 minutes, the contact portion between the light-shielding film and the lens barrel was visually observed. No leakage was found, and it was confirmed that the adhesion between the light-shielding film and the lens barrel was good.
【００２４】また、この遮光フィルムから長さ２０ｃ
ｍ、幅２ｃｍの試験片を採取し、引張試験機（オリエン
テック社製、テンシロン）のチャック（間隔１００ｍ
ｍ）にセットし、温度２５℃、引張速度２０ｍｍ／ｍｉ
ｎの条件で、チャック間隔が１０３ｍｍになるまで伸長
させ、その状態で保持し、１分経過時の応力（寸法復元
力＝締付力）を測定したところ、４．６ｋｇ／ｍｍ2 で
あった。The light-shielding film has a length of 20c.
m, a test piece having a width of 2 cm was collected, and a chuck of a tensile tester (Tensilon, manufactured by Orientec Co., Ltd.) (interval: 100 m)
m) at a temperature of 25 ° C. and a tensile speed of 20 mm / mi
Under the condition of n, the chuck was stretched until the chuck interval became 103 mm, held in that state, and the stress (dimensional restoring force = tightening force) after one minute was measured was 4.6 kg / mm 2 . .
【００２５】実施例２ 厚さ５０μｍのＰＥＴフィルムの片面に両面接着テープ
（日東電工社製、商品名ＮＯ．５００）を貼着する。Example 2 A double-sided adhesive tape (trade name: No. 500, manufactured by Nitto Denko Corporation) is adhered to one side of a PET film having a thickness of 50 μm.
【００２６】そして、このＰＥＴフィルムの両面テープ
貼着面に、実施例１で用いたの同じ片面接着処理済みＰ
ＴＦＥフィルムを接着させることにより遮光フィルム
（厚さ１３０μｍ）を得た。Then, the same single-sided adhesive P used in Example 1 was applied to the surface of the PET film to which the double-sided tape was attached.
A light-shielding film (thickness: 130 μm) was obtained by bonding a TFE film.
【００２７】この遮光フィルムについて、実施例１と同
様に試験を行なった。摺動試験においては、遮光フィル
ムとレンズ筒の密着性は良好であった。また、応力試験
ではその応力は３．６ｋｇ／ｃｍ2 であった。This light-shielding film was tested in the same manner as in Example 1. In the sliding test, the adhesion between the light-shielding film and the lens barrel was good. In the stress test, the stress was 3.6 kg / cm 2 .
【００２８】比較例 旋盤での切削厚さが１５０μｍになるようにすること以
外は実施例１と同様に作業してＰＴＦＥフィルムを得、
これを遮光フィルムとした。Comparative Example A PTFE film was obtained in the same manner as in Example 1 except that the thickness of the lathe was changed to 150 μm.
This was used as a light-shielding film.
【００２９】この遮光フィルムについて、実施例１と同
様に試験を行なった。摺動試験においては、遮光フィル
ムとレンズ筒の密着性が悪く、レンズ筒との間に隙間を
生じ光の漏洩があった。また、応力試験ではその応力は
３．０ｋｇ／ｃｍ2 と弱かった。This light-shielding film was tested in the same manner as in Example 1. In the sliding test, the adhesion between the light-shielding film and the lens barrel was poor, and a gap was formed between the lens barrel and light leakage. In the stress test, the stress was as weak as 3.0 kg / cm 2 .
【００３０】[0030]
【発明の効果】本発明は上記のように構成され、フッ素
樹脂層に合成樹脂層を積層したので、カメラに組み込ん
だとき、レンズ筒との密着力が大きく、遮光効果が優れ
ている。The present invention is constructed as described above, and since the synthetic resin layer is laminated on the fluororesin layer, when incorporated in a camera, the adhesion to the lens barrel is large and the light shielding effect is excellent.
【図１】従来の遮光フィルムを組み込んだカメラの要部
を示す説明図である。FIG. 1 is an explanatory view showing a main part of a camera incorporating a conventional light-shielding film.
【図２】従来の遮光フィルムの実例を示す正面図であ
る。FIG. 2 is a front view showing an example of a conventional light-shielding film.
【図３】本発明に係る遮光フィルムの実例を示す側面図
である。FIG. 3 is a side view showing an example of a light-shielding film according to the present invention.
１ フッ素樹脂層 ２ 合成樹脂層 ３ 貫通孔 ４ 接着剤層 ５ 遮光フィルム DESCRIPTION OF SYMBOLS 1 Fluororesin layer 2 Synthetic resin layer 3 Through hole 4 Adhesive layer 5 Light shielding film
Claims (1)
られた合成樹脂層を有することを特徴とするカメラ用遮
光フィルム。1. A light-shielding film for a camera, comprising a fluororesin layer and a synthetic resin layer provided on the fluororesin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24841997A JPH1184214A (en) | 1997-09-12 | 1997-09-12 | Light shielding film for camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24841997A JPH1184214A (en) | 1997-09-12 | 1997-09-12 | Light shielding film for camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1184214A true JPH1184214A (en) | 1999-03-26 |
Family
ID=17177849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24841997A Pending JPH1184214A (en) | 1997-09-12 | 1997-09-12 | Light shielding film for camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1184214A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101843401B1 (en) * | 2017-12-22 | 2018-03-29 | (주)코원티엔에스 | A spacer for camera lens with reduced flare phenomenon and manufacturing method thereof |
-
1997
- 1997-09-12 JP JP24841997A patent/JPH1184214A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101843401B1 (en) * | 2017-12-22 | 2018-03-29 | (주)코원티엔에스 | A spacer for camera lens with reduced flare phenomenon and manufacturing method thereof |
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